Hi everyone,

I have connected my FPGA to a phillips PDP11A with the following
connections: rxd to RCV, rxdp to Vp, rxdn to Vm, txdp to Vpo, txdn to
Vmo and txoe to oe. I confirmed these against some previouse threds,
one by Ash and another by Martin Hecht so no probs there.

Anyway, when I program my FPGA (with a parallel IV cable) it gets
about 95% compete then freezes and claims the done pin did not go
high. I have measured this pin and even set it high my self but the same
thing happens...
I can load smaller programs just fine, so it might be a clocking / sync
problem.

Has anybody else experianced this or something similar?

Thanks
Michael

Hi Michael, I'm also trying to do something similar and I had the same problem. You could try the following: 1) If your soldered the FPGA by hand, check the wire connections for the programming circuit again. Sometimes the wires come loose and give problems(bad connections). 2) I don't know which FPGA you are using, but I had this problem with ALTERA FLEX10K30E I've discovered that you have to perform certain steps in sequence to program the FPGA. You first compile and synthesize your top level and once its done, plug in the programming cable, then click on the programming icon or select it using a menu (depending on which software/FPGA u are using). Then program the device and after its done disconnect the cable. If everything fails, close the program, re-systhesize and perform step 2 again. Hope this helps... Rahul ----- Original Message ----- From: Michael.maggs@student.griffith.edu.au Date: Monday, May 10, 2004 8:51 pm Subject: [usb] Programming terminated due to error.

hi I faced this problem with Xilinx FPGAs, first of all what mode of programming are u using, is it slave serial mode or boundary scan or what. slave serial mode should be the easiest to deal with. check ur cable setup from BIOS, it better be SPP (standard parallel port). if the problems still exists, few restarts would help!! regards Abukhater Michael.maggs@student.griffith.edu.au wrote: Hi everyone, I have connected my FPGA to a phillips PDP11A with the following connections: rxd to RCV, rxdp to Vp, rxdn to Vm, txdp to Vpo, txdn to Vmo and txoe to oe. I confirmed these against some previouse threds, one by Ash and another by Martin Hecht so no probs there. Anyway, when I program my FPGA (with a parallel IV cable) it gets about 95% compete then freezes and claims the done pin did not go high. I have measured this pin and even set it high my self but the same thing happens... I can load smaller programs just fine, so it might be a clocking / sync problem. Has anybody else experianced this or something similar? Thanks Michael _______________________________________________ http://www.opencores.org/mailman/listinfo/usb --------------------------------- Do you Yahoo!? Win a $20,000 Career Makeover at Yahoo! HotJobs -------------- next part -------------- An HTML attachment was scrubbed... URL: http://www.opencores.org/forums/usb/attachments/20040511/a202c236/attachment.htm